That, to Maya, your scene is nothing more than a collection of nodes and connections, which together compose the dependency graph.
What a dependency graph node is and how it relates to what you see in the 3D viewer.
That the Channel Box and Attribute Editor windows are the Maya interface’s most commonly used tools to manipulate the attributes of dependency graph nodes.
That certain nodes, but not all, are part of the transform hierarchy, which establishes spatial relationships among objects.
How to use the Outliner, the Hypergraph, and the Connection Editor to examine how nodes fit into the dependency graph and the transform hierarchy.
How common tasks, such as creating objects, setting animation ...